For the following hypothesis test With n 80 9 and 471 sta

For the following hypothesis test: With n = 80, = 9, and = 47.1, state the calculated value of the test statistic z.

a.)3.151 b.) -3.121 c.) -2.141 d.) 2.087

Solution

Note: Value of population mean is n\'t given, I assumed it missed to provide data & figured out its value as 45 from the Q&A Manual. H0: < 45
HA : > 45
a=0.02
With n = 80, = 9, and = 47.1, state the calculated value of the test statistic z.

Test Statistic
Population Mean(U)=45
Given That X(Mean)=47.1
Standard Deviation(S.D)=9
Number (n)=80
we use Test Statistic (Z) = x-U/(s.d/Sqrt(n))
Zo=47.1-45/(9/Sqrt(80)
Zo =2.087